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Chevrolet Silverado / GMC Sierra. Manual - part 2361
Repair Procedures
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Brake Fluid Level Indicator Switch Replacement (JD9, JF3, JF7)
Parking Brake Indicator Switch Replacement
Control Module References for BCM and IPC replacement, setup, and programming
BRAKE PULSATION
Step
Action
Yes
No
DEFINITION: Fluctuation or pulsation is felt through the brake pedal, steering wheel, seat,
floor, and/or in the vehicle ONLY when braking.
1
Were you sent here from the Hydraulic Brake
Symptom table?
Go to Step 2
Go to Diagnostic
Starting Point -
Hydraulic
Brakes
2
1. Inspect the disc brake system for the
following conditions.
Excessive thickness variation of rotor
friction surfaces
Excessive assembled lateral runout
(LRO) of rotor friction surfaces
Hard spots, heat checks, bluing
discoloration of rotor friction
surfaces; possibly due to brake drag
Excessive corrosion of rotor friction
surfaces; including red, gray or black
oxidation
Loose, damaged or missing caliper or
lining hardware
Bent or damaged caliper or mounting
component
Excessive LRO of wheel hub/axle
flange; due to damage and/or loose or
excessively worn bearings
2. Adjust, repair or replace components as
2008 Chevrolet Silverado 1500
2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
BRAKE SYSTEM NOISE
necessary. Refer to Disc Brake System
Diagnosis.
Did you find and correct a condition?
Go to Step 3
Go to Diagnostic
Starting Point -
Hydraulic
Brakes
3
1. Install or connect components that were
removed or disconnected during diagnosis.
2. Road test the vehicle in order to confirm
proper operation. Refer to Brake System
Vehicle Road Test.
Is the condition still present?
Go to Step 2
System OK
Step
Action
Yes
No
DEFINITION: Vehicle exhibits abnormal noise when braking; vehicle may exhibit
abnormal noise during motion just after brake pedal release.
1
Were you sent here from the Hydraulic Brake
Symptom table?
Go to Step 2
Go to Diagnostic
Starting Point -
Hydraulic
Brakes
1. Inspect the disc brake system for the
following conditions.
Lining wear indicator contact with
rotor
Debris trapped between rotor and
splash shield or backing plate; and/or
debris trapped between rotor and
linings
Contaminated linings
Aftermarket linings
Glazed linings
Distorted, cracked or damaged
linings
Excessively worn linings
Damaged or excessively worn caliper
hardware and/or lining hardware
2008 Chevrolet Silverado 1500
2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
2
Incorrectly installed, loose or missing
caliper hardware and/or lining
hardware
Lack of lubrication or excessive
corrosion on metal to metal contact
surfaces
Bent or damaged splash shield or
backing plate
Hard spots, heat checks, blueing
discoloration of rotor friction
surfaces
Glazed rotor friction surfaces
Bent or damaged caliper or mounting
component
2. Adjust, repair or replace components as
necessary. Refer to Disc Brake System
Diagnosis.
Did you find and correct a condition?
Go to Step 9
Go to Step 3
3
1. Inspect the brake assist system for the
following conditions.
Lack of lubrication or excessively
worn pushrod or pedal pivots or pivot
bushings
Bent or damaged pedal pushrod,
pedal, or pedal bracket
Damaged or improperly operating
vacuum booster and/or check valve, if
equipped
Low power steering fluid level, if
equipped with hydraulic boost
Improperly tensioned, excessively
worn or damaged power steering belt,
if equipped with hydraulic boost
Restricted return hose from hydraulic
booster, if equipped
2008 Chevrolet Silverado 1500
2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Improperly operating hydraulic
booster, if equipped
Improperly functioning power
steering system, if equipped with a
hydraulic booster assembly
Contaminated power steering fluid, if
equipped with hydraulic boost
2. Adjust, repair or replace components as
necessary. Refer to Brake Assist System
Diagnosis (Hydraulic Assist).
Did you find and correct a condition?
Go to Step 9
Go to Step 4
4
1. Inspect the hydraulic brake system for the
following conditions.
Improper operation of caliper pistons
Contaminated brake fluid
2. Adjust, repair or replace components as
necessary. Refer to Hydraulic Brake
System Diagnosis.
Did you find and correct a condition?
Go to Step 9
Go to Step 5
5
Is the vehicle equipped with a drum-in-rotor
type of park brake system?
Go to Step 6
Go to Step 9
6
Ensure the park brake shoes are not adjusted too
tightly, possibly causing a noise under certain
conditions.
Are the park brake shoes adjusted too tightly?
Go to Step 7
Go to Step 9
7
1. Clean and inspect the park brake shoes for
excessive wear and/or damage.
2. Inspect the drum portion of the rotors for
excessive wear, blueing discoloration, heat
spots, and excessive radial runout.
3. If any of these conditions are present,
replace the affected components.
4. Adjust the park brake system.
Did you find and correct a condition?
Go to Step 9
Go to Step 8
2008 Chevrolet Silverado 1500
2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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